Jen returns from Paris; seconds later a taxicab at Dulles hits a pedestrian; at home Jen finds a curious sight in her study; at Jeanne's hospital she meets the injured walker, Dee, who's agitated and uncooperative. The Department of Homeland Security has ordered all NCIS agents in Washington to take polygraph tests; Fornell tells Gibbs the who and why behind that. Dee receives two strange visitors, and he arrests; Tony sees that Dee had just returned from Caracas, Venezuela, and he comments on that; Dee dies; later Tony and Jeanne encounter the visitors in the morgue; they together deal with a problem. Jen summons most of the gang back to the shop on a Friday night; Gibbs gives McGee an unusual assignment, and he finishes it; Abby gets a surprising fingerprint match. Jeanne introduces Tony to her father.
—DocRushing